Search for $\beta^+$EC and ECEC processes in $^{74}$Se
| dc.contributor.author | BARABASH, A. S. | |
| hal.structure.identifier | Centre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG] | |
| dc.contributor.author | HUBERT, P. | |
| hal.structure.identifier | Centre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG] | |
| dc.contributor.author | NACHAB, A. | |
| dc.contributor.author | UMATOV, V. | |
| dc.date.created | 2006 | |
| dc.date.issued | 2006 | |
| dc.date.conference | 2006-09-03 | |
| dc.description.abstractEn | For the first time, limits on double-beta processes in $^{74}$Se have been obtained using a 400 cm$^3$ HPGe detector and an external source consisting of natural selenium powder. At a confidence level of 90%, they are $1.9\times 10^{18}$ y for the $\beta^+$EC$(0\nu + 2\nu)$ transition to the ground state, $7.7\times 10^{18}$ y for the ECEC($2\nu$) transition to the $2^+_1$ excited state in $^{74}$Ge (595.8 keV), $1.1\times 10^{19}$ y for the ECEC($0\nu$) transition to the $2^+_1$ excited state in $^{74}$Ge (595.8 keV) and $5.5\times 10^{18}$ y for the ECEC($2\nu$) and ECEC($0\nu$) transitions to the $2^+_2$ excited state in $^{74}$Ge (1204.2 keV). The last transition is discussed in association with a possible enhancement of the decay rate, in this case by several orders of magnitude, because the ECEC$(0\nu)$ process is nearly degenerate with an excited state in the daughter nuclide. Prospects for investigating such processes in future experiments are discussed. | |
| dc.language.iso | en | |
| dc.title.en | Search for $\beta^+$EC and ECEC processes in $^{74}$Se | |
| dc.type | Communication dans un congrès | |
| dc.subject.hal | Physique [physics]/Physique des Hautes Energies - Expérience [hep-ex] | |
| dc.identifier.arxiv | hep-ex/0610046 | |
| bordeaux.country | FR | |
| bordeaux.conference.city | Paris | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | in2p3-00126822 | |
| hal.version | 1 | |
| hal.invited | non | |
| hal.proceedings | non | |
| hal.conference.end | 2006-09-09 | |
| hal.popular | non | |
| hal.audience | Non spécifiée | |
| hal.origin.link | https://hal.archives-ouvertes.fr//in2p3-00126822v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.date=2006&rft.au=BARABASH,%20A.%20S.&HUBERT,%20P.&NACHAB,%20A.&UMATOV,%20V.&rft.genre=unknown |
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